CN103029174B - Control system for coal mine underground water-jet cutting machine - Google Patents
Control system for coal mine underground water-jet cutting machine Download PDFInfo
- Publication number
- CN103029174B CN103029174B CN201210583588.9A CN201210583588A CN103029174B CN 103029174 B CN103029174 B CN 103029174B CN 201210583588 A CN201210583588 A CN 201210583588A CN 103029174 B CN103029174 B CN 103029174B
- Authority
- CN
- China
- Prior art keywords
- valve
- communicated
- pilot operated
- control valve
- operated directional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 52
- 239000003245 coal Substances 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000003921 oil Substances 0.000 claims description 34
- 239000010720 hydraulic oil Substances 0.000 claims description 24
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000002828 fuel tank Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 238000010892 electric spark Methods 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000219991 Lythraceae Species 0.000 description 1
- 235000014360 Punica granatum Nutrition 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 pottery Substances 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a control system for a coal mine underground water-jet cutting machine. An oil tank (1) is communicated with a hydraulic pump (4); the hydraulic pump (4) is communicated with a second pilot operated directional control valve (9); the second pilot operated directional control valve (9) is communicated with the left oil cavity and the right oil cavity of a dual-purpose boosting cylinder (26) respectively; a first mandrel plunger valve (14) and a second mandrel plunger valve (15) are arranged in the left oil cavity and the right oil cavity respectively; the second mandrel plunger valve (15) is communicated with a first pilot operated directional control valve (8); the first mandrel plunger valve (14) is communicated with the first pilot operated directional control valve (8); the first pilot operated directional control valve (8) is communicated with the hydraulic pump (4); and the left water cavity and the right water cavity of the dual-purpose boosting cylinder (26) are communicated with an energy accumulator (23) and a water pump (22) respectively, so that a control system is formed as a whole. The entire system can be operated without generating electric sparks or other sparks, can be applied to occasions such as mining, fire control, rescue, explosion protection and the like, and is particular suitable for performing coal mine underground cutting operation.
Description
Technical field
The present invention relates to water cutting machine, be specifically related to the control system of water cutting machine under a kind of coal mine.
Technical background
Since first set commercialization adds sand water-jet cutting machine and is used to cut vehicle glass, along with some specific demand of scientific and technical development and material cutting processing, the application of water cutting technique is expanded rapidly.Water cutting machine utilizes high-pressure water jet to cut material, belong to cold conditions cutting, directly utilize the kinetic energy that adds sand water jet to cut metal and reach cutting object, in cutting process, without chemical change, have cutting material physicochemical property without impact, without thermal deformation, the advantage such as joint-cutting is narrow, precision is high, tangent plane is bright and clean, cleanliness without any pollution.Water cutting machine is current the most a kind of machine of high production capacity in the world, can cut almost any material, except processing conventional metal (compound) material, also can process with traditional diamond-making technique and cannot process or unmanageable material, as glass, pottery, composite, reflectorized material, chemical fibre, heat-sensitive material etc.Water cutting can not produce harmful gas or liquid, can not produce heat at surface of the work, has the features such as multi-functional, high efficiency, is the model of environmental type cutting processing.
The water jet that water cutting machine utilizes high pressure (300 ~ 450MPa) to add pomegranate sand directly injects to processed material to reach cutting object with high speed (about 300m/s) from sandpipe.High-pressure water jet is realized by the continuous reciprocating motion of pressurized cylinder, and water cutter major part is jewel nozzles (diameter 0.25 ~ 0.33mm).
At present, the research of numerical control water cutter bed is both at home and abroad with manufacture substantially in the stage of ripeness, and its range of application contains the material cutting of every field.But at some special occasions, because water-jet machine is permanent plant, the material that cannot carry is difficult to carry out cutting processing, as mining, fire-fighting are rescued, the field such as explosion-proof.
Summary of the invention
The object of the invention is to: the control system that water cutting machine under a kind of coal mine is provided, water cutting machine is portable, can meet the material that cannot carry is carried out to cutting processing, complete machine operation does not produce electric spark or other spark, can use in mining, fire-fighting and the occasion such as rescue, explosion-proof, be particularly suitable for cutting operation under coal mine.
Technical solution of the present invention is: this water cutting machine comprises water cutting tool and control system, water cutting tool connection control system, whole formation water cutting machine, it is characterized in that: described control system comprises fuel tank, the first oil filter, the second oil filter, hydraulic pump, pressure-reducing valve, pilot operated compound relief valve, the first check valve, the first pilot operated directional control valve, the second pilot operated directional control valve, the second check valve, the first flow speed control valve, the second flow speed control valve, the 3rd check valve, the first push rod plunger valve, the second push rod plunger valve, the first hydraulic oil pipe, the second hydraulic oil pipe, the 4th check valve, the 5th check valve, the 6th check valve, the 7th check valve, water pump, accumulator and double acting pressurized cylinder, fuel tank is communicated with hydraulic pump through the first oil filter, hydraulic pump is communicated with respectively pilot operated compound relief valve and the second pilot operated directional control valve, and pilot operated compound relief valve is communicated with respectively the second oil filter and the second pilot operated directional control valve, and the second pilot operated directional control valve is through the second check valve, the first flow speed control valve is communicated with the left oil pocket of double acting pressurized cylinder, and the second pilot operated directional control valve is through the second flow speed control valve, the 3rd check valve is communicated with the right oil pocket of double acting pressurized cylinder, the first push rod plunger valve is installed in the left oil pocket of double acting pressurized cylinder, the second push rod plunger valve is installed in the right oil pocket of double acting pressurized cylinder, the second push rod plunger valve is communicated with the first pilot operated directional control valve through the first hydraulic oil pipe, the first push rod plunger valve is communicated with the first pilot operated directional control valve through the second hydraulic oil pipe, and the first pilot operated directional control valve is through the first check valve, pressure-reducing valve is communicated with hydraulic pump, the first pilot operated directional control valve is communicated with the second pilot operated directional control valve, the left water cavity of double acting pressurized cylinder is communicated with accumulator through the 4th check valve, the left water cavity of double acting pressurized cylinder is communicated with water pump through the 6th check valve, the right water cavity of double acting pressurized cylinder is communicated with accumulator through the 5th check valve, right water cavity the 7th check valve of double acting pressurized cylinder is communicated with water pump, whole formation control system.
Wherein, setting pressure table and safety valve on accumulator.
The present invention is simple in structure, lightweight, easy to carry, simple to operate, and operating efficiency is high.
Accompanying drawing explanation
Fig. 1 is control system schematic diagram of the present invention.
In figure: 1 fuel tank, 2 first oil filters, 3 second oil filters, 4 hydraulic pumps, 5 pressure-reducing valves, 6 pilot operated compound relief valves, 7 first check valves, 8 first pilot operated directional control valves, 9 second pilot operated directional control valves, 10 second check valves, 11 first flow speed control valves, 12 second flow speed control valves, 13 the 3rd check valves, 14 first push rod plunger valves, 15 second push rod plunger valves, 16 first hydraulic oil pipes, 17 second hydraulic oil pipes, 18 the 4th check valves, 19 the 5th check valves, 20 the 6th check valves, 21 the 7th check valves, 22 water pumps, 23 accumulators, 24 Pressure gauges, 25 safety valves, 26 double acting pressurized cylinders.
The specific embodiment
As shown in Figure 1, this water cutting machine comprises water cutting tool and control system, water cutting tool connection control system, whole formation water cutting machine, it is characterized in that: described control system comprises fuel tank 1, the first oil filter 2, the second oil filter 3, hydraulic pump 4, pressure-reducing valve 5, pilot operated compound relief valve 6, the first check valve 7, the first pilot operated directional control valve 8, the second pilot operated directional control valve 9, the second check valve 10, the first flow speed control valve 11, the second flow speed control valve 12, the 3rd check valve 13, the first push rod plunger valve 14, the second push rod plunger valve 15, the first hydraulic oil pipe 16, the second hydraulic oil pipe 17, the 4th check valve 18, the 5th check valve 19, the 6th check valve 20, the 7th check valve 21, water pump 22, accumulator 23 and double acting pressurized cylinder 26, fuel tank 1 is communicated with hydraulic pump 4 through the first oil filter 2, hydraulic pump 4 is communicated with respectively pilot operated compound relief valve 6 and the second pilot operated directional control valve 9, pilot operated compound relief valve 6 is communicated with respectively the second oil filter 3 and the second pilot operated directional control valve 9, the second pilot operated directional control valves 9 through the second check valve 10, the first flow speed control valve 11 is communicated with the left oil pocket of double acting pressurized cylinder 26, and the second pilot operated directional control valve 9 is through the second flow speed control valve 12, the 3rd check valve 13 is communicated with the right oil pocket of double acting pressurized cylinder 26, the first push rod plunger valve 14 is installed in the left oil pocket of double acting pressurized cylinder 26, the second push rod plunger valve 15 is installed in the right oil pocket of double acting pressurized cylinder 26, the second push rod plunger valve 15 is communicated with the first pilot operated directional control valve 8 through the first hydraulic oil pipe 16, the first push rod plunger valve 14 is communicated with the first pilot operated directional control valve 8, the first pilot operated directional control valves 8 through the first check valve 7 through the second hydraulic oil pipe 17, pressure-reducing valve 5 is communicated with hydraulic pump 4, the first pilot operated directional control valve 8 is communicated with the second pilot operated directional control valve 9, the left water cavity of double acting pressurized cylinder 26 is communicated with accumulator 23 through the 4th check valve 18, the left water cavity of double acting pressurized cylinder 26 is communicated with water pump 22 through the 6th check valve 20, the right water cavity of double acting pressurized cylinder 26 is communicated with accumulator 23 through the 5th check valve 19, right water cavity the 7th check valve 21 of double acting pressurized cylinder 26 is communicated with water pump 22, whole formation control system.
Wherein, setting pressure table 24 and safety valve 25 on accumulator 23.
During installation, accumulator 23 connects water cutting tool, connects the logical sewer of flexible pipe on safety valve 25, and water pump 22 is communicated with cistern, during work, the cutting tool of fetching boiling water, start the motor of the internal-combustion engine M that drives water pump 22, for preventing that the waste gas spark of internal combustion engine is discharged in air ambient, by arc control in the exhaust opening access water of motor of the internal-combustion engine M, water in cistern is pressed into respectively to left water cavity and the right water cavity of double acting pressurized cylinder 26 and continues to be full of through the 6th check valve 20, the 7th check valve 21, and left water cavity and right water cavity enter water cutting tool and export large flow from cutter through the 4th check valve 18, the 5th check valve 19 respectively and flow out, close water cutting tool, start the motor of the internal-combustion engine M that drives hydraulic pump 4, for preventing that the waste gas spark of internal combustion engine is discharged in air ambient, by arc control in the exhaust opening access water of motor of the internal-combustion engine M, hydraulic pump 4 is through first oil filter 2 oil suction from fuel tank 1, the second pilot operated directional control valve 9 is under right-hand member spring action, be initially in left position access state, hydraulic oil promotes that piston moves right and the low-pressure water of right water cavity is added and is pressed into water under high pressure and is pressed into and connects the pipeline of water cutting tool and be stored in accumulator 23 through the 5th check valve 19 through the left position of the second pilot operated directional control valve 9 and through the left oil pocket that the second check valve 10 enters double acting pressurized cylinder 26, accumulator 23 regulates the fluctuation of water cutting pressure, now, the left water cavity of double acting pressurized cylinder 26 is pressed into low-pressure water and is full of by water pump 22, the hydraulic oil of the right oil pocket of double acting pressurized cylinder 26 enters through the second oil filter 3 movement velocity that fuel tank 1, the second flow speed control valve 12 regulates double acting pressurized cylinders through the second flow speed control valve 12 and through the left position of the second pilot operated directional control valve 9, when the piston of double acting pressurized cylinder 26 is encountered the push rod of the second push rod plunger valve 15 of right-hand member, push rod promotes that plunger moves right and the high viscosity hydraulic oil that pushes in the first hydraulic oil pipe 16 makes the first pilot operated directional control valve 8 be shifted to right position access state, the hydraulic oil process pressure-reducing valve 5 of hydraulic pump 4 right-hand member that enters the second pilot operated directional control valve 9 through the right position of the first pilot operated directional control valve 8 through the first check valve 7 promote the second pilot operated directional control valve 9 and are shifted to right position access state, now the hydraulic oil of hydraulic pump 4 is through the right position of the second pilot operated directional control valve 9 and promote piston through the right oil pocket that the 3rd check valve 13 enters double acting pressurized cylinder 26 and add and be pressed into water under high pressure and be pressed into and connect the pipeline of water cutting tool and be stored in accumulator 23 through the 4th check valve 18 to left movement and by the low-pressure water of double acting pressurized cylinder 26 left water cavities, accumulator 23 plays the effect of pressure oscillation while regulating water cutting, now, the right water cavity of double acting pressurized cylinder 26 is pressed into low-pressure water and is full of by water pump 22, the hydraulic oil of the left oil pocket of double acting pressurized cylinder 26 enters through the second oil filter 3 movement velocity that fuel tank 1, the first flow speed control valve 11 regulates double acting pressurized cylinders 26 through the first flow speed control valve 11 and through the right position of the second pilot operated directional control valve 9, when the piston of double acting pressurized cylinder 26 is encountered the push rod of the first push rod plunger valve 14 of left end, the high viscosity hydraulic oil that push rod promotion plunger is moved to the left and pushes in the second hydraulic oil pipe pipe 17 makes the first pilot operated directional control valve 8 be shifted to left position access state, the hydraulic oil process pressure-reducing valve 5 of hydraulic pump 4 left end that enters the second pilot operated directional control valve 9 through the left position of the first pilot operated directional control valve 8 through the first check valve 7 promote the second pilot operated directional control valve 9 and are shifted to left position access state, enter next actuation cycle, no matter double acting pressurized cylinder 26 moves left and right, and accumulator 23 is always pressed into water under high pressure and plays the effect of pressure oscillation while regulating water cutting, water under high pressure is received water cutting tool after adding sand, and the high-pressure water jet of water cutting tool outlet carries out cutting processing to associated materials, on accumulator 23, setting pressure table 24 is read pressure registration, and on accumulator 23, mounting safety valve 25 assurance accumulators 23 are worked under safe pressure, and the outlet of safety valve 25 connects the logical sewer of flexible pipe and avoids water under high pressure to injure near personnel and device.
Claims (2)
1. the control system of water cutting machine under coal mine, this water cutting machine comprises water cutting tool and control system, water cutting tool connection control system wholely forms water cutting machine, it is characterized in that: described control system comprises fuel tank (1), the first oil filter (2), the second oil filter (3), hydraulic pump (4), pressure-reducing valve (5), pilot operated compound relief valve (6), the first check valve (7), the first pilot operated directional control valve (8), the second pilot operated directional control valve (9), the second check valve (10), the first flow speed control valve (11), the second flow speed control valve (12), the 3rd check valve (13), the first push rod plunger valve (14), the second push rod plunger valve (15), the first hydraulic oil pipe (16), the second hydraulic oil pipe (17), the 4th check valve (18), the 5th check valve (19), the 6th check valve (20), the 7th check valve (21), water pump (22), accumulator (23) and double acting pressurized cylinder (26), fuel tank (1) is communicated with hydraulic pump (4) through the first oil filter (2), hydraulic pump (4) is communicated with respectively pilot operated compound relief valve (6) and the second pilot operated directional control valve (9), pilot operated compound relief valve (6) is communicated with respectively the second oil filter (3) and the second pilot operated directional control valve (9), and the second pilot operated directional control valve (9) is through the second check valve (10), the first flow speed control valve (11) is communicated with the left oil pocket of double acting pressurized cylinder (26), and the second pilot operated directional control valve (9) is through the second flow speed control valve (12), the 3rd check valve (13) is communicated with the right oil pocket of double acting pressurized cylinder (26), the first push rod plunger valve (14) is installed in the left oil pocket of double acting pressurized cylinder (26), the second push rod plunger valve (15) is installed in the right oil pocket of double acting pressurized cylinder (26), the second push rod plunger valve (15) is communicated with the first pilot operated directional control valve (8) through the first hydraulic oil pipe (16), the first push rod plunger valve (14) is communicated with the first pilot operated directional control valve (8) through the second hydraulic oil pipe (17), and the first pilot operated directional control valve (8) is through the first check valve (7), pressure-reducing valve (5) is communicated with hydraulic pump (4), the first pilot operated directional control valve (8) is communicated with the second pilot operated directional control valve (9), the left water cavity of double acting pressurized cylinder (26) is communicated with accumulator (23) through the 4th check valve (18), the left water cavity of double acting pressurized cylinder (26) is communicated with water pump (22) through the 6th check valve (20), the right water cavity of double acting pressurized cylinder (26) is communicated with accumulator (23) through the 5th check valve (19), right water cavity the 7th check valve (21) of double acting pressurized cylinder (26) is communicated with water pump (22), whole formation control system.
2. the control system of water cutting machine under coal mine according to claim 1, is characterized in that: wherein, accumulator (23) is setting pressure table (24) and safety valve (25) above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210583588.9A CN103029174B (en) | 2012-12-30 | 2012-12-30 | Control system for coal mine underground water-jet cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210583588.9A CN103029174B (en) | 2012-12-30 | 2012-12-30 | Control system for coal mine underground water-jet cutting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103029174A CN103029174A (en) | 2013-04-10 |
| CN103029174B true CN103029174B (en) | 2014-12-03 |
Family
ID=48016824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210583588.9A Active CN103029174B (en) | 2012-12-30 | 2012-12-30 | Control system for coal mine underground water-jet cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103029174B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960036B (en) * | 2015-06-23 | 2016-09-07 | 天津艾浮瑞特科技有限公司 | Mining water cutter hydraulic system remote controllers |
| CN105041308A (en) * | 2015-06-29 | 2015-11-11 | 徐庆余 | Method for mining by cutting machine |
| CN105081473A (en) * | 2015-09-07 | 2015-11-25 | 天津艾浮瑞特科技有限公司 | Mining flexible shaft remote control cutter |
| CN106523335A (en) * | 2016-08-25 | 2017-03-22 | 湖南莫尔顿智能勘探机器人有限公司 | Automatic reversing water pump |
| CN107101903A (en) * | 2017-06-02 | 2017-08-29 | 常州大学 | HTHP multiphase flow injecting type erosion-corrosion experiment device |
| CN107655761B (en) * | 2017-10-30 | 2021-03-23 | 上海应用技术大学 | Rupture disk pressure relief test system and method |
| CN108916148A (en) * | 2018-07-30 | 2018-11-30 | 安徽理工大学 | A kind of Mine anchorage cable tensioning machine hydraulic system |
| CN111173783B (en) * | 2020-01-08 | 2021-07-23 | 中国计量大学 | Portable hydraulic pressure expansion water cutting device |
| CN113503279A (en) * | 2021-05-21 | 2021-10-15 | 凯盛重工有限公司 | Short-stroke hydraulic accurate speed regulation system for water cutting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413807A (en) * | 2002-09-27 | 2003-04-30 | 广东科达机电股份有限公司 | Backwater control system of water cut-off machine |
| CN101666339A (en) * | 2009-09-30 | 2010-03-10 | 山东交通学院 | Hydraulic pressurizer |
| CN102383769A (en) * | 2011-10-14 | 2012-03-21 | 上海大学 | Power compensation type hydraulic pressurizing water injection system |
| CN202479978U (en) * | 2012-02-01 | 2012-10-10 | 佛山市金福板业有限公司 | Self-circulating cold-state processing water cutting apparatus |
-
2012
- 2012-12-30 CN CN201210583588.9A patent/CN103029174B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413807A (en) * | 2002-09-27 | 2003-04-30 | 广东科达机电股份有限公司 | Backwater control system of water cut-off machine |
| CN101666339A (en) * | 2009-09-30 | 2010-03-10 | 山东交通学院 | Hydraulic pressurizer |
| CN102383769A (en) * | 2011-10-14 | 2012-03-21 | 上海大学 | Power compensation type hydraulic pressurizing water injection system |
| CN202479978U (en) * | 2012-02-01 | 2012-10-10 | 佛山市金福板业有限公司 | Self-circulating cold-state processing water cutting apparatus |
Non-Patent Citations (4)
| Title |
|---|
| 上海市业余工业大学.《液压传动与控制》.《液压传动与控制》.上海科学技术出版社,1981,第136~137页. * |
| 关肇勋等.《实用液压回路》.《实用液压回路》.上海科学技术文献出版社,1982,第13~14页,44~50页,84页. * |
| 赵民等.《石材加工装备及工艺》.《石材加工装备及工艺》.机械工业出版社,2004,第177~181页. * |
| 陆望龙.《实用塑料机械液压传动故障排除》.《实用塑料机械液压传动故障排除》.湖南科学技术出版社,2002,第125~126页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103029174A (en) | 2013-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103029174B (en) | Control system for coal mine underground water-jet cutting machine | |
| CN103447970B (en) | A kind of vehicle-mounted Water Cutting system | |
| CN201461616U (en) | Pneumatic high-pressure supercharger control system | |
| CN202348527U (en) | Energy storage system | |
| CN202017666U (en) | Gas supercharging device | |
| CN102352827B (en) | Energy storage system | |
| CN203460064U (en) | Vehicle-mounted water cutting system | |
| CN104179657A (en) | Passive pneumatic pressurizing device for underground coal mine | |
| CN201343993Y (en) | Drilling rig with water spraying device | |
| CN202597031U (en) | Air recovery and secondary compression device | |
| CN203627124U (en) | Three-output hydraulic mechanically-driven pump | |
| CN205436901U (en) | Small -size air force bar shear of high pressure | |
| CN202970737U (en) | Air pressure support column pressurization air supply system | |
| CN103671001B (en) | Three output hydraulic pressure motor pumps | |
| CN204436642U (en) | Diesel generating set oil-fired system | |
| CN201614935U (en) | Screw rock breaker | |
| CN202338518U (en) | Casing-head gas recovery device for electrohydraulic push rods | |
| CN102828754B (en) | Environment-friendly high-pressure quarrying machine and environment-friendly quarrying process | |
| CN103835872A (en) | Blade control device with independent oil supply system | |
| CN204493054U (en) | Diesel generator comperssed air starting system | |
| CN202249977U (en) | Mining pneumatic filter type oil pumping device | |
| CN203212087U (en) | Tension overload protective system | |
| CN209430181U (en) | Long-range pressure relief system | |
| CN217442851U (en) | Dual-purpose cylinder pressure detection device for mining production automobile engine | |
| CN202344035U (en) | Hydraulic diamond chain saw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: HUAIAN POWER SUPPLY COMPANY OF JIANGSU ELECTRIC PO Free format text: FORMER OWNER: HUAIJIN POLYTECHNICAL COLLEGE Effective date: 20141028 Owner name: STATE GRID CORPORATION OF CHINA JIANGSU ELECTRIC P Effective date: 20141028 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Yuewu Inventor after: Li Weiguo Inventor after: Cui Shuchun Inventor after: Li Yi Inventor after: Ding Daqing Inventor before: Yang Dachun Inventor before: He Feng |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YANG DACHUN HE FENG TO: WANG YUEWU LI WEIGUO CUI SHUCHUN LI YI DING DAQING Free format text: CORRECT: ADDRESS; FROM: 223005 HUAIAN, JIANGSU PROVINCE TO: 223002 HUAIAN, JIANGSU PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20141028 Address after: Huaihai Road 223002 Huaian city of Jiangsu Province, Qingpu District No. 134 Applicant after: Huaian Power Supply Company of Jiangsu Electric Power Company Applicant after: State Grid Corporation of China Applicant after: Jiangsu Electric Power Company Address before: 223005 Huaian city of Jiangsu Province, while the road No. 1 Applicant before: Huaijin Polytechnical College |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |